如何在Swift中以编程方式更改tvOS中的背景颜色？

Question

I would like to change programmatically the color of the background in the main view (I'm creating an app with Swift).I tryed to put this code in viewDidLoad() but it doesn't work. What is the correct way to do this?

override func viewDidLoad() {
  super.viewDidLoad()
   ...
   let myBackground = UIView()
   let colorWhite = UIColor(red: 255, green: 255, blue: 255, alpha: 1)
   myBackground.backgroundColor = colorWhite
   ...
  }
}

Answer 1

You are creating a new subview, which is not added to your view stack yet. Instead, it's much simpler:

override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = UIColor.whiteColor()

    // Or with RGB:
    view.backgroundColor = UIColor(red: 142 / 255.0, green: 142 / 255.0, blue: 147 / 255.0, alpha: 1.0)
} 

Answer 2

Also you can change the background color depends on what time people do watch (AM or PM):

var t = time(nil)
    var tmValue = tm()
    localtime_r(&t, &tmValue)
    let hour = tmValue.tm_hour
    if hour > 12 {
        view.backgroundColor = UIColor.brownColor()
    } else {
        view.backgroundColor = UIColor.whiteColor()
    }